Beta'ed by:Al Ilmo Noor,CRMLDNSN and eclipsed flower

Prologue

"Ne, Onee-chan."

Sitting innocently in the living-room, a boy blinked his wide brown eyes cutely at the bunny plush in his lap as if expecting the stuffed toy to answer him. 'How cute~' thought Nana, chuckling softly at her five year old boy's antics. A child's imagination sure knew no boundaries! But what Nana did not know was that little Tsu-kun, instead of talking to the fluffy plushy in his lap, was actually speaking to a transparent young woman in her mid-twenties sitting in front of him. The lady was completely invisible to the sweetly humming house-wife's eyes.

"Why won't Onee-chan be my real sister?" he asked, looking straight at his 'Onee-chan' in confusion.

And hearing this, the young lady's grey orbs lost a little of their usual shine and she ran a hand through her pony tail, freeing silver wavy locks that fell down to reach the middle of her back, perfectly illuminating her pale white skin. She started playing with the ends of her black and white maid costume's sleeves before looking up, a soft yet strained smile on her lips, and she held out her hands to cup little Tsu-kun's cheeks, the latter pouting at the action.

"It's because I can't." The brunet's cheeks turned bright red, dissatisfied with the answer and the young woman's amused chuckle that followed held an underlying sense of bitterness in it.

O.O.O.O.O.O.O.O.O.O.O

"It's quite normal for a child to have one or two imaginary friends. In contrary it is proof of his rich and boundless imagination."

Or, that's what the doctor told her anyway. But Nana still had doubts of her own. She hadn't really given it any thought before but as of late, nine-year-old Tsuna had been acting strange. Sometimes she would catch him screaming and yelling at them. To her it just looked like a mad boy yelling at thin air.

But still, who was she to distrust a specialist? Nana could only hope that she was overreacting and that her little Tsu-kun would grow up... normal.

Well, she hoped.

O.O.O.O.O.O.O.O.O.O

Tsuna was only twelve years old when he first told her about the red-eyed women disturbing his sleep every night to make him play with her and turned violent if he refused. Of course, she didn't believe that and lectured him as sternly as someone as sweet as Nana could about the fact that even though I-pin and Fuuta were younger than him, they were more mature and unlike him, didn't invent lies so they could sleep with their mama.

That night however, looking into those puppy eyes, Nana just couldn't refuse and eventually gave in. Looking back at it now, she should have taken note of the sudden decrease in temperature when she woke up from her little boy's whimpering and screams of pain and fear. She shouldn't have dismissed the whole thing as just a simple nightmare either. Unfortunately, she didn't have that foresight and she did both. She gently stroked the now sleeping brunet in her arms before falling back to sleep.

But Tsuna woke up once again as a chilling air forced him out from his sweet dreams to meet glowing red eyes.

He shook his mother's hands to no avail and cold sweat ran down his face because of the fear the low temperature generated. He tried to get up only to find out that he couldn't move a muscle. His body felt heavier. Just as Tsuna regained sense of his frantic breathing, he felt a harsh pressure falling on top of him, crushing his lungs. 'Move!' But it was all useless and he resorted to mumbling a soft chant.

As the suffocating pressure slowly subsided, he jumped up, panting hard in need of air. But the glowing red eyes didn't leave. The owner of those very eyes stood beside his bed, staring intently at the poor brunet.

Messy, long, black hair. Dark, glowing, red eyes. A Victorian-style black dress. It was her, no doubt about it. Shaking his head, Tsuna made his way to escape whilst keeping an eye on the red-eyed woman. But the more he stared at her eyes, the heavier his eyelids felt, and the last thing he could remember were those red, gleaming eyes before darkness completely obscured his vision, and he unconsciously mumbled a soft 'good night.'

AN: If you noticed, he was having sleep paralysis – and yes, the way I described how he felt when he had sleep paralysisis different from the usual symptoms, but I wrote this –sleep paralysis thingy- based on my own experience.

And just in case you don't know what sleep paralysis is, here's some info for ya...

Sleep paralysis is a phenomenon in which people, either when falling asleep or wakening, temporarily experience a sense of inability to move, similar to when an arm or leg goes to sleep, but not associated with numbness. More formally, it is a transition state between wakefulness and rest characterized by complete muscle atonia (muscle weakness). It can occur at sleep onset or when awakening. It is believed a result of disrupted REM sleep, which is normally characterized by complete muscle atonia that prevents individuals from acting out their dreams. Sleep paralysis has been linked to disorders such as narcolepsy, migraines, anxiety disorders, and obstructive sleep apnea; however, it can also occur in isolation. When linked to another disorder, sleep paralysis commonly occurs in association with the neuromuscular disorder narcolepsy

Note: Tsuna wasn't bullied that much in canon, right? So, in this story I'll make it so he won't be bullied to the extent that he would actually need to pull out a first aid kit and bandage his body and all, and his classmate will still interact with him normally, not really minding his Dame-ness.

Anyway, the seat in Tsuna's class in this story will be six rows to the back.

P.S. Please don't kill me after this chapter….

Song reference/s: Alice – Hatsune Miku